CN101814398A - Alternating current contactor and control method thereof - Google Patents
Alternating current contactor and control method thereof Download PDFInfo
- Publication number
- CN101814398A CN101814398A CN200910009215A CN200910009215A CN101814398A CN 101814398 A CN101814398 A CN 101814398A CN 200910009215 A CN200910009215 A CN 200910009215A CN 200910009215 A CN200910009215 A CN 200910009215A CN 101814398 A CN101814398 A CN 101814398A
- Authority
- CN
- China
- Prior art keywords
- contactor
- contact
- control
- speed
- velocity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The invention provides an alternating current contactor and a contact velocity control method thereof. The alternating current contactor comprises an electrical moving contact (1) and electrical static contact (2) which are opposite to each other and also comprises a movable core (3) and fixed iron core (4) which are opposite to each other, wherein the movable core (3) is mechanically connected with the electrical moving contact (1), a control coil (5) is placed in the fixed iron core (4), and a switch transistor (Q) is used to turn on/off the control coil (5), thus the fixed iron core (4) generates/eliminates electromagnetic attraction to the movable core (3) and drives the electrical moving contact and the electrical static contact to connect or disconnect. The alternating current contactor also comprises a contact velocity control device (6) which is used to perform closed loop feedback control to connect or disconnect speed of the electrical moving contact and the electrical static contact.
Description
Technical field
The present invention relates to a kind of A.C. contactor and control method thereof, particularly a kind of electrical contact is wherein disconnected and closed contact velocity carries out the low-voltage alternating-current contactor and the control method thereof of close-loop feedback control.
Background technology
Fig. 1 shows the traditional low-voltage alternating-current contactor in the present industrial contactor product.Wherein Zuo Ce photo illustrates the internal structure of the actual product of low-voltage alternating-current contactor, the right side be corresponding structural representation.As shown in Figure 1, traditional low-voltage alternating-current contactor comprises the housing (not shown), is contained in contact and iron core in the housing.Described contact comprises electro-pneumatic contact 1 and the electric fixed contact 2 that is oppositely arranged, and described iron core comprises movable core 3 and the secured core 4 that is oppositely arranged.Described movable core 3 links to each other with described electro-pneumatic contact 1 machinery, and described secured core 4 is holding control coil 5 therein.By to control coil 5 energising, described movable core 3 is produced suction spur that it is downward, drive described electro-pneumatic contact 1 simultaneously and described electric fixed contact 2 closures downwards, when contacting, they realize electric contact.After two contact contacts, described movable core 3 also can move downward a segment distance again, on two iron core closures, to guarantee that electrical contact contacts reliably.
For make contactor can be fast, adhesive reliably, a kind of relatively design of safety has all been adopted in the design of existing control coil open loop controlling schemes, that is,, provide much larger than the actual closed needed magnitude of current of contactor iron core to control coil at the contactor closed action.So just there are some problems, because the energy that control coil provides is much larger than the actual closed energy that needs of contact, just cause the speed of contactor moving contact of closing moment excessive, through closed bump, this part bump kinetic energy will change into very big noise, and dynamic and static contact is caused electric and mechanical wearing and tearing.When contactor disconnects, also there is similar problem,, can causes voice beastly equally because opening speed also is open loop control.At some noise level is had the occasion of specific (special) requirements, as between elevator control, have to adopt D.C. contactor as the control switch device at present, this switching device noise is little, but cost height and closing time are longer.The contactor of some big electric current models is because voice and wearing and tearing cause shortening of useful life.
Summary of the invention
At present contactor disconnect and when closed speed not have the problem controlled, the present invention proposes a kind of novel solution.
According to A.C. contactor of the present invention, it comprises: electro-pneumatic contact that is oppositely arranged and electric fixed contact, and movable core that is oppositely arranged and secured core; Described movable core links to each other with described electro-pneumatic contact machinery, described secured core is holding control coil therein, by a switching transistor control coil is carried out the on/off electricity and make secured core, drive electro-pneumatic, fixed contact closure or disconnection movable core generation/elimination electromagnetic attraction.It is characterized in that described A.C. contactor also comprises the contact velocity control device, be used for the disconnection and the closing speed of described electro-pneumatic contact and described electric fixed contact are carried out close-loop feedback control.
According to A.C. contactor of the present invention, wherein said contact velocity control device (6) comprising: power on/off detector (65) is used to detect the energising/outage action of contactor; Velocity transducer (62) is used to detect described electrical contact and disconnects and closed rate signal; Microprocessor system (61), be used for the speed that detects according to the testing result of power on/off detector (65) and velocity transducer (62), thereby handle the adjustable pwm control signal of output duty cycle to the conducting of switching transistor (Q), control by action through specific control algolithm.
According to A.C. contactor of the present invention, wherein said control algolithm is proportional integral, proportion integration differentiation algorithm.
According to A.C. contactor of the present invention, wherein said velocity transducer (62) detects by the speed from the parts of external detection and electrical contact interlock that described electrical contact disconnects and closed rate signal.
According to A.C. contactor of the present invention, wherein said contact velocity control device (6) also comprises: A/D analog to digital converter (63), be used for converting the rate signal that described velocity transducer (62) detects to digital signal, be imported into microprocessor control system (61) then; DC control supply generator (64) produces the required DC power supply of contact velocity control device (6) that is fit to according to input voltage.
According to A.C. contactor of the present invention, wherein DC control supply generator (64) is input as alternating voltage.
According to A.C. contactor of the present invention, wherein said contact velocity control device (6) is positioned at the outside of A.C. contactor main body mechanical structure.
According to A.C. contactor of the present invention, described A.C. contactor also comprises driver (7), be used to receive microprocessor system (61) thus the pwm control signal of output to the conducting of switching transistor (Q), control by action.
According to the contact velocity control method of A.C. contactor of the present invention, comprise the energising/outage action that detects A.C. contactor; Detecting described electrical contact disconnects and closed speed; The testing result and the speed that detect step according to power on/off detect the speed that step obtains, thereby handle the adjustable pwm control signal of output duty cycle through specific control algolithm the contact velocity of A.C. contactor are controlled.
According to the contact velocity control method of A.C. contactor of the present invention, wherein said control algolithm is proportional integral, proportion integration differentiation algorithm.
The present invention with above-mentioned feature has following advantage:
Be convenient to install, only need add the controlled function that an annex can be realized speed in the contactor outside, need not to open the internal structure of contactor or change contactor, by the speed of velocity transducer detection with the electrical contact linkage part, realized the function of speed control in the contactor outside, need not the contactor internal structure is changed.
Noise in the time of can reducing the contactor closed and disconnected by the control to speed, particularly suitable has the occasion of specific (special) requirements to noise, controls as elevator.
To the wearing and tearing of electrical contact, prolong the useful life of product in the time of can reducing the contactor closure by closed-loop control to speed; Utilization is to the control of speed, thereby reduced electric and mechanical loss, and by to being provided with of program different control rates being set, to reach different closed opening speeds and the requirement of time.
Description of drawings
By below in conjunction with the detailed description of accompanying drawing, will understand the present invention better to example embodiment.It should be clearly understood that described example embodiment only is as an illustration and example, and the invention is not restricted to this.The spirit and scope of the present invention are only limited by the particular content of appended claims.Brief description of drawings is described below, wherein:
Fig. 1 illustrates traditional low-voltage alternating-current contactor, and wherein Zuo Ce photo illustrates the internal structure of the actual product of low-voltage alternating-current contactor, the right side be corresponding structural representation;
Fig. 2 illustrates the circuit diagram according to the contact velocity control device of the low-voltage alternating-current contactor of the embodiment of the invention;
Fig. 3 illustrates the flow chart according to the contact velocity control method of the low-voltage alternating-current contactor of the embodiment of the invention;
Fig. 4 illustrates the low-voltage alternating-current contactor actual sample picture according to the embodiment of the invention.
Embodiment
Can understand by top explanation, for disconnection and the closing speed that reaches the control contactor contact, the present invention at first needs to detect the movement velocity of probe of contactor, according to the electric current of the speed control that is detected by the control coil 5 among Fig. 1, thereby the disconnection of control contactor contact and closed electromagnetic attraction, and then the speed of the disconnection of control contactor contact and closure reaches the requirement of expectation.Be that the present invention overcomes shortcoming of the prior art by the speed of probe of contactor is carried out closed-loop control.
Specifically, the present invention is by realizing at the outside additional contact velocity control device of contactor.
Fig. 2 illustrates the circuit diagram according to the contact velocity control device of the low-voltage alternating-current contactor of the embodiment of the invention.
As shown in Figure 2, the contact velocity control device 6 according to the low-voltage alternating-current contactor of the embodiment of the invention comprises microprocessor system 61, velocity transducer 62, A/D analog to digital converter 63, DC control supply generator 64, power on/off detector 65.
DC control supply generator 64 according to the interchange of input or refer to that direct voltage produce to be fit to be used for the required DC power supply of probe of contactor rate control process, preferably, be input as alternating voltage.
Power on/off detector 65 detects the electric power thus supplied of contactor, after detecting the powering-off state that probe of contactor will disconnect action, power on/off detector 65 provides the speed-control scheme of signalisation microprocessor control system 61 probe of contactor when carrying out outage.After detecting the connection situation that probe of contactor will carry out closed action, power on/off detector 65 provides the speed-control scheme of signalisation microprocessor control system 61 probe of contactor when carrying out energising.
The conducting duty ratio of switching tube Q is big more, and is just big more by the electric current of control coil 5, and the electromagnetic force that 4 pairs of described movable cores 3 of secured core produce is also just big more, otherwise electromagnetic force is just more little.The electrical contact of lv contactor is made a concerted effort down the counteractive spring force that is subjected to electromagnetic force and linkage part, and speed also can increase thereupon or reduce.
When control coil 5 passes through suitable current, 4 pairs of described movable cores 3 of secured core produce suitable suction, spurring it moves downward, move downward and described electric fixed contact 2 closures thereby drive electro-pneumatic contact 1 simultaneously, when electro-pneumatic contact 1 contacts with electric fixed contact 2, realize electric contact.
When electro-pneumatic contact 1 with after electric fixed contact 2 contacts, movable core 3 moves downward a segment distance again, up to movable core 3 and secured core 4 closures, thereby guarantees that electrical contact reliably contacts.
This control is to be realized by close-loop feedback control by the described contact velocity control device 6 among the present invention.
Therefore, can make the speed of probe of contactor closed and disconnected maintain a fixing value substantially, thereby realize the closed-loop control of contact speed by contact velocity control device 6 of the present invention; By the setting to program parameter, we can be provided with different speed control values, to reach the requirement of different closure/opening speeds and time simultaneously.Setting, the PWM control algolithm of concrete parameter can design according to concrete contactor product parameters.This can realize for those of ordinary skills fully, at this, omits the detailed description to above-mentioned specific design.
Fig. 3 illustrates the flow chart according to the contact velocity control method of the low-voltage alternating-current contactor of the embodiment of the invention.
As shown in Figure 3, at step S1, detect probe of contactor and carry out power-on servicing or carry out power operation, just detection contact disconnects action or carries out closed action.
If carry out power-on servicing, then carry out step S2, the detection contact movement velocity, and judge whether speed is suitable.If speed is improper, then at step S4, adjust the duty ratio of PWM ripple according to concrete control algolithm, carry out step S6 then.If speed is suitable, then directly carry out step S6.At step S6, whether detection contact is closed fully, if closed fully, then at step S8, the duty ratio of keeping the PWM ripple is constant, keeps contact reliably closed, then finishing control.
If carry out power operation, then carry out step S3, the detection contact movement velocity, and judge whether speed is suitable.If speed is improper, then at step S5, adjust the duty ratio of PWM ripple according to concrete control algolithm, carry out step S7 then.If speed is suitable, then directly carry out step S7.At step S7, whether detection contact disconnects fully, if disconnect fully, then at step S9, output PWM ripple makes switch Q end fully, keeps contact reliably to disconnect, then finishing control.
Fig. 4 illustrates the low-voltage alternating-current contactor actual sample picture according to the embodiment of the invention.As shown in Figure 4, the low-voltage alternating-current contactor according to the embodiment of the invention comprises a traditional low-voltage alternating-current contactor on right side and the contact velocity control device that is positioned at the left side transparent outer cover that adds in its outside.
According to above-mentioned concrete structure, can be under the situation that does not change the inner main electric and internal mechanical structure of traditional contactor according to the low-voltage alternating-current contactor of the embodiment of the invention, only need externally increase an electrical accessory (being the contact velocity control device), detect the speed of contactor outside and contact linkage part by the velocity transducer in the electrical accessory, and feed back in the interior microprocessor control system of electrical accessory, through the specific controlled PWM ripple of algorithm output, thereby control flows is crossed the electric current of control coil, contactor disconnects and closed speed to change, and then reaches the purpose that reduces noise and contact wear.
Low-voltage alternating-current contactor of the present invention with above-mentioned feature has following advantage:
1. be convenient to install, only need add the controlled function that an annex can be realized speed in the contactor outside, need not to open the structure of contactor or change contactor, by the speed of velocity transducer detection with the electrical contact linkage part, realized the function of speed control in the contactor outside, need not the contactor internal structure is changed.
2. the noise in the time of can reducing the contactor closed and disconnected by the control to speed, particularly suitable has the occasion of specific (special) requirements to noise, controls as elevator.
3. to the wearing and tearing of electrical contact, prolong the useful life of product in the time of can reducing the contactor closure by closed-loop control to speed; Utilization is to the control of speed, thereby reduced electric and mechanical loss, and by to being provided with of program different control rates being set, to reach different closed opening speeds and the requirement of time.
Those skilled in the art can clearly learn, can carry out various improvement and variation to described low-voltage alternating-current contactor.Those skilled in the art will clearly learn other embodiment by the actual effect of considering specification and described low-voltage alternating-current contactor.Should be understood that specification and example only are to consider as an example, scope of the present invention is limited by claim and their equivalents.
Claims (10)
1. A.C. contactor, it comprises: electro-pneumatic contact (1) that is oppositely arranged and electric fixed contact (2), and movable core that is oppositely arranged (3) and secured core (4); Described movable core (3) links to each other with described electro-pneumatic contact (1) machinery, described secured core (4) is holding control coil (5) therein, by a switching transistor (Q) control coil (5) being carried out the on/off electricity makes secured core (4) to movable core (3) generation/elimination electromagnetic attraction, drive electro-pneumatic, fixed contact closure or disconnection
It is characterized in that described A.C. contactor also comprises contact velocity control device (6), be used for the disconnection and the closing speed of described electro-pneumatic contact and described electric fixed contact are carried out close-loop feedback control.
2. A.C. contactor as claimed in claim 1, wherein said contact velocity control device (6) comprising:
Power on/off detector (65) is used to detect the energising/outage action of contactor;
Velocity transducer (62) is used to detect described electrical contact and disconnects and closed rate signal;
Microprocessor system (61), be used for the speed that detects according to the testing result of power on/off detector (65) and velocity transducer (62), thereby handle the adjustable pwm control signal of output duty cycle to the conducting of switching transistor (Q), control by action through specific control algolithm.
3. A.C. contactor as claimed in claim 2, wherein said control algolithm are proportional integral, proportion integration differentiation algorithm.
4. A.C. contactor as claimed in claim 2, wherein said velocity transducer (62) detect by the speed from the parts of external detection and electrical contact interlock that described electrical contact disconnects and closed rate signal.
5. A.C. contactor as claimed in claim 2, wherein said contact velocity control device (6) also comprises:
A/D analog to digital converter (63) is used for converting the rate signal that described velocity transducer (62) detects to digital signal, is imported into microprocessor control system (61) then;
DC control supply generator (64) produces the required DC power supply of contact velocity control device (6) that is fit to according to input voltage.
6. A.C. contactor as claimed in claim 5, wherein DC control supply generator (64) is input as alternating voltage.
7. A.C. contactor as claimed in claim 2, wherein said contact velocity control device (6) is positioned at the outside of A.C. contactor main body mechanical structure.
8. as the described A.C. contactor of claim 1-7, described A.C. contactor also comprises driver (7), be used to receive microprocessor system (61) thus the pwm control signal of output to the conducting of switching transistor (Q), control by action.
9. the contact velocity control method of an A.C. contactor comprises
Detect the energising/outage action of A.C. contactor;
Detecting described electrical contact disconnects and closed speed;
The testing result and the speed that detect step according to power on/off detect the speed that step obtains, thereby handle the adjustable pwm control signal of output duty cycle through specific control algolithm the contact velocity of A.C. contactor are controlled.
10. the contact velocity control method of A.C. contactor as claimed in claim 9, wherein said control algolithm is proportional integral, proportion integration differentiation algorithm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910009215A CN101814398A (en) | 2009-02-24 | 2009-02-24 | Alternating current contactor and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910009215A CN101814398A (en) | 2009-02-24 | 2009-02-24 | Alternating current contactor and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101814398A true CN101814398A (en) | 2010-08-25 |
Family
ID=42621616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910009215A Pending CN101814398A (en) | 2009-02-24 | 2009-02-24 | Alternating current contactor and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101814398A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155908A (en) * | 2014-08-25 | 2014-11-19 | 沈阳工业大学 | Intelligent contactor closed-loop control system and method based on follow-up control in moving process |
| CN105606841A (en) * | 2015-12-18 | 2016-05-25 | 苏州权素船舶电子有限公司 | Speed sensor |
| CN113948337A (en) * | 2020-07-16 | 2022-01-18 | 施耐德电器工业公司 | Method for resetting a service life diagnostic alarm for a contact of a contactor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241012A (en) * | 1998-06-25 | 2000-01-12 | 库帕实业公司 | Electrical switchgear with synchronous control system and actuator |
| DE10010756A1 (en) * | 2000-03-04 | 2001-09-06 | Daimler Chrysler Ag | Method of regulating the movement characteristic of an armature e.g. for electromagnetic actuator of internal combustion (IC) engine gas-exchange valve, involves detecting a detector magnitude |
| CN1402878A (en) * | 1999-12-03 | 2003-03-12 | 西门子公司 | Electromagnetic switchgear comprising controlled drive, corresponding method and circuit |
| EP1344903A2 (en) * | 2002-03-14 | 2003-09-17 | Ford Global Technologies, Inc. | A Control Method and System for Soft-Landing an Electromechanical Actuator |
| CN101127282A (en) * | 2007-06-08 | 2008-02-20 | 西安交通大学 | Intelligent AC contactor control unit based on current-variable control |
| CN101203931A (en) * | 2005-06-16 | 2008-06-18 | 西门子公司 | Electromagnetic switching device and operating method |
-
2009
- 2009-02-24 CN CN200910009215A patent/CN101814398A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241012A (en) * | 1998-06-25 | 2000-01-12 | 库帕实业公司 | Electrical switchgear with synchronous control system and actuator |
| CN1402878A (en) * | 1999-12-03 | 2003-03-12 | 西门子公司 | Electromagnetic switchgear comprising controlled drive, corresponding method and circuit |
| DE10010756A1 (en) * | 2000-03-04 | 2001-09-06 | Daimler Chrysler Ag | Method of regulating the movement characteristic of an armature e.g. for electromagnetic actuator of internal combustion (IC) engine gas-exchange valve, involves detecting a detector magnitude |
| EP1344903A2 (en) * | 2002-03-14 | 2003-09-17 | Ford Global Technologies, Inc. | A Control Method and System for Soft-Landing an Electromechanical Actuator |
| CN101203931A (en) * | 2005-06-16 | 2008-06-18 | 西门子公司 | Electromagnetic switching device and operating method |
| CN101127282A (en) * | 2007-06-08 | 2008-02-20 | 西安交通大学 | Intelligent AC contactor control unit based on current-variable control |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155908A (en) * | 2014-08-25 | 2014-11-19 | 沈阳工业大学 | Intelligent contactor closed-loop control system and method based on follow-up control in moving process |
| CN105606841A (en) * | 2015-12-18 | 2016-05-25 | 苏州权素船舶电子有限公司 | Speed sensor |
| CN105606841B (en) * | 2015-12-18 | 2018-10-30 | 浙江日雅摩托车有限公司 | A kind of velocity sensor |
| CN113948337A (en) * | 2020-07-16 | 2022-01-18 | 施耐德电器工业公司 | Method for resetting a service life diagnostic alarm for a contact of a contactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102882239A (en) | Battery charging apparatus with a common control loop for a low drop-out voltage regulator and a boost regulator | |
| CN104712823A (en) | Electromagnetic driving device for electromagnetic valve | |
| CN101814398A (en) | Alternating current contactor and control method thereof | |
| CN102315043A (en) | Double-closed-loop feedback-control module | |
| CN201156501Y (en) | Electromagnetical controller apparatus for AC contactor | |
| CN208046489U (en) | A kind of direct current oil pump soft starting device of none-disk terminal contactor | |
| CN105282937B (en) | Switch bleeder circuit and control method | |
| CN102826429A (en) | Construction elevator capable of operating at modulated frequency and power frequency | |
| CN201976067U (en) | Variable frequency control device of fan | |
| CN103779119B (en) | No-voltage adhesive Zero current disjunction exchanges one pole intelligent switch | |
| CN103198977B (en) | Contactor coil power supply circuits | |
| CN201556538U (en) | Permanent magnetic controller for switch apparatus | |
| CN203558063U (en) | Variable-frequency mobile leakage harvester | |
| CN211321243U (en) | High-voltage intelligent dynamic voltage-regulating reactive power compensation device | |
| CN203588791U (en) | Drive circuit of electromagnetic coil | |
| CN102801383A (en) | Alternating current motor driving device with charging function and charging method thereof | |
| CN203398542U (en) | Improved cubicle gas insulated switchgear electric operation device | |
| CN202510816U (en) | Intelligent permanent magnet control valve | |
| CN201638743U (en) | Permanent-magnet vacuum circuit breaker | |
| CN100521028C (en) | Permanent-magnetic operation type electromagnetic combined contactor | |
| CN215835186U (en) | Emergency equipment and vehicle | |
| CN220822920U (en) | Double-phase voltage regulating circuit | |
| CN105811811B (en) | A kind of adaptive auto coupling decompression start device and method of alternating current generator | |
| CN201708693U (en) | Modulation type DC power supplier | |
| CN104503363A (en) | Switch control system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100825 |